https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3ATrillas%20and%20su-to%3ASOCIOLOG%C3%83%C2%ADA&format=rss2 Search results for 'Provider:Trillas and su-to:SOCIOLOGíA' at Biblioteca UGB 0 20